The four most popular models on the road in the U.S., according to Experian Automotive, are:

Ford F-150: 3.4% Honda Accord: 2.6% Toyota Camry: 2.6% Chevy Silverado: 2.0%

One final note: For all the attention that's been given to hybrid and electric vehicles over the last decade, they are just 0.9 percent of the vehicles in operation in the U.S. That works out to a little over 2 million alternatively powered vehicles.

—By CNBC’s Phil LeBeau

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